Fool around
Meaning: to behave in a silly way or have a good time, to waste time doing something unnecessary
Example: Stop fooling around - this is serious! I wish you didn't spend so much time fooling around.
Выучи грамотный разговорный английский до уверенного владения всего за 9 месяцев по системе естественного усвоения иностранных языков. Жми!
Example: Stop fooling around - this is serious! I wish you didn't spend so much time fooling around.